Reinforcing-back for brake-shoes.



NITED s'r 'rEs PATENT onnion.

' ALAN T. LOCKARD, SUFFERN, NEW YORK, ASSIGNOR TO AMERICAN BRAKE SHOE &EOUHDRY COMPANY, OF MAHWAH, NEW JERSEY, A CORPORATION OF NEW JERSEY.

To all whom it may concern:

Be it known that I, ALAN T.'LOCKARD, a citizen of the United States, andaresident of Sufl'ern, in the county of Rockland and State of New York,have made and invented certain. new and useful Improves mentsinReinforcing-Backs for Brake- Shoes, of which the following is aspecification. I

This invention relates to reinforcingbacks Y for brake shoes, andmoreparticularly to that style or type of back wherein the central portionis outwardly looped, so-as to forin anv integral lug.

The body of a brake shoe is liable to become broken and fractured duringservice, and particularly at the central portion thereof, and in thoseinstances where a reinforcing back is used which is formed with anoutwardly looped integral lug, the back is liable to spread and the lugto open'up, and it is therefore an object of the present invention tobrace the lug portion of the back against opening up and spreading, themeans employed. being in nowise dependent upon the cast metal. body ofthe shoe, so that the reinforcing back will remain intact, regardless ofthe extent to which the 'body of the shoe may become fractured andbroken.

A further object is to accomplish the afore-mentioned ends in a simpleand expeditious manner, wherein the material re- .moved from the sidesof the lug for the formation of the keyway openings is utilized to holdthe lug against spreading, andresults in the formation. of a continuousreinforcing back.

Other objects and advantages Will appear as the description proceeds,wherein it is to be understood that changes in the precise embodiment ofthe invention can be made within the scope of what is claimed withoutdeparting from the spirit thereof.

The preferred embodiment of my invention is illustrated in theaccompanying drawings, wherein:

Figure 1 is a view in plan of the blank from which my improvedreinforcing back is formed; Fig. 2 is a view in side elevation of thecompleted back; Fig 3 is a view in longitudinal vertical section of abrake shoe having my improved back incorporated therein; Fig. 4 is aview in vertical section taken on the line 4% of Fig. 3: and Fig. 5

RnmroncmG-Biicx ron BRAKE-SHOES.

Specification of Letters Patent.

Patented Apr. 18, 1916.

Application filed February 15, 1916.- Serial No. 78,368.

is a fragmental view in perspective of my lmproved reinforcing back,with one portion of the lug cut away so as to disclose the interlockingconnection between the integral t1e plates Which project across the openextremity of the lug.

Referring specifically to Fig.1, the blank 10 is provided at its centraland"l-ug-fonm ing portion 11 with the oppositely-extending- U-shapeslits 12. These slits are spaced symmetrically about the center of theblank and define spaced tongues 13, having interlocking confronting ends14. The blank, as above outlined, is subj ected to the action ofsuitable forming-dies, and the central portion 11 thereof is outwardlylooped to form the integral lug 15. At the same time the central portion11 is outwardly looped, the tongues 13 are bent into the general planeof the back,'forming tie plates 16, the interlocking ends 14 of whichare brought into engagement, defining a continuous back. The downwardbending of the tongues 13 results in the formation of suitable keywayopenings 17 in the sides of the lug, allowing the attaching key to bepassed therethrough and the brake shoe to be secured to a brake head.

The reinforcing back is placed within a suitable mold and the wearingbody 18 of the shoe is cast therearound, the metal flowin up throughsuitable openings 19 provi ed in the tie plates. The exact formation ofthe interlocking ends of the tie plates may be varied, and has beenillustrated in the present drawing as being of dovetail shape toindicate one form of connection.

'What I claim is 1. A brake shoe comprising a reinforcing back with acentrally formed lug, tie plates projecting beneath .said lug andprovided with interlocking ends.

2. A reinforcing back for brake shoes provided with a looped integrallug, tie plates cut fromthe sides of said lug and extending across thebase of said lug, said tie plates provided with interlocking ends.

3. A reinforcing back for brake shoes with a looped integral lug, tieplates formed integral with the base portion of said lug, projectingacross the open extremity thereof, and provided with interlocking ends.

4. A reinforcing back for brake shoes with a looped lug, tie platesformed integral with the base portions of said lug, projecting acrossthe open extremity there- I of, and disposed in the general plane of theback, said tie plates proyided' with interlocking ends.

5. A reinforcing back for brake shoes with a looped lug, and tie platesprojecting across the open extremity of said lug and disposed in thegeneral plane of the back and proyided with connected ends.

6. A-reinforcing back for brake shoes with a looped lug, and tie platesformed from the sides of said lug, defining keyway openings therein,said tie plates projecting across the open extremity of said lug andprovidedwith connected ends.

7. A reinforcing back for brake shoes with a looped lug, and tie platesformed openings therein, said tie plates projecting across the openextremity of said lug and.

from the sides of said lug, defining keyway provided with interlockingends.

8. A reinforcing back for. brake shoes with a looped lug, a tie plateprojecting across the open extremity of said lug and formed from thesides thereof, defining keyway openings in said lug, the said tie 'platedisposed'in thegeneral plane of the back and having its ends formedintegral with the basesof said lug.

9. A brake shoe comprising a reinforcing back with a centrally formedlug, tie plates with interlocking ends projecting across the openextremity of said lug, .and abody of wearing metal cast. upon saidreinforcing back.

10. A brake shoe comprisin'g'a reinforcing'back with a centrally formedlug, tie plates with interlocking ends projecting across the openextremityof said lug,';a nd a body of wearing metalcast upon saidreinforcing back, the cast metal-0f thebody embedding the interlockingends of the tie plates therein.-

signed at Chicagoin the-county of Cook 7thdayof Feband State of Illinoisthis ruary A. D. 1916. Witnesses:

- JAMES'A. 'WILsON, F. M. DRENNAN.

ALAN TQilooKnR

